Police called to NASA Glenn Research Center in Cleveland after reports of gunman inside

CLEVELAND - Brook Park police have been called to NASA Glenn Research Center.
NewsChannel5 has gotten reports that there is a gunman inside building 77. The building is on lockdown. There is an ambulance on standby.
A viewer who has connections inside the building said there were reports of shots fired. An e-mail into newsnet5.com said he is communicating with someone in the building who said one person has been shot and the shooter currently un accounted for.
A spokeswoman for NASA Glenn said that there is an unverified report of a possible activity involving a gun. Katherine Martin said Glenn is implementing proper action for employees and facilities. The whole center is on lockdown.
Several people are standing outside the building.
No other information is being released.